Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

X-ray Crystallography02:18

X-ray Crystallography

23.8K
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
23.8K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Field-resolved observation of exciton coherence in a van der Waals magnet.

Nature materials·2026
Same author

Enhanced second-harmonic generation from WS2/ReSe2 heterostructure.

The Journal of chemical physics·2026
Same author

Room-temperature valley-selective emission in Si-MoSe<sub>2</sub> heterostructures enabled by high-quality-factor chiroptical cavities.

Nature communications·2025
Same author

Photoinduced twist and untwist of moiré superlattices.

Nature·2025
Same author

Determining the complex second-order optical susceptibility in macroscale van der Waals heterobilayers.

The Journal of chemical physics·2025
Same author

Terahertz-Induced Tunnel Ionization Drives Coherent Raman-Active Phonon in Bismuth.

Physical review letters·2025

Related Experiment Video

Updated: Jun 5, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.4K

High-harmonic generation from artificially stacked 2D crystals.

Christian Heide1,2, Yuki Kobayashi1,2, Amalya C Johnson3

  • 1Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA 94025, USA.

Nanophotonics (Berlin, Germany)
|December 5, 2024
PubMed
Summary

We demonstrate controlled high-order harmonic generation (HHG) in stacked transition metal dichalcogenide (TMDC) crystals. The intensity of HHG scales with layer number and stacking, offering new possibilities for nanoscale light sources and material probes.

Keywords:
2D materialsheterostructureshigh-harmonic generationstrong-field physicstransition metal dichalcogenides

More Related Videos

Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

9.7K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

8.7K

Related Experiment Videos

Last Updated: Jun 5, 2025

Fabricating van der Waals Heterostructures with Precise Rotational Alignment
09:25

Fabricating van der Waals Heterostructures with Precise Rotational Alignment

Published on: July 5, 2019

9.4K
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
10:52

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

9.7K
Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals
10:35

Novel Techniques for Observing Structural Dynamics of Photoresponsive Liquid Crystals

Published on: May 29, 2018

8.7K

Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Quantum Optics

Background:

  • High-order harmonic generation (HHG) is a key nonlinear optical process.
  • Transition metal dichalcogenides (TMDCs) are promising materials for optoelectronic applications.

Purpose of the Study:

  • To investigate coherent layer-by-layer HHG in artificially stacked TMDC crystals.
  • To explore the influence of stacking configuration and layer number on HHG.
  • To assess the potential of HHG as a probe for layered materials.

Main Methods:

  • Synthesis of millimeter-sized single crystalline TMDC monolayers via gold foil-exfoliation.
  • Artificial stacking of TMDC monolayers on a transparent substrate.
  • Generation of high-order harmonics (up to 19th order) using a mid-infrared (MIR) laser.

Main Results:

  • HHG intensity shows sensitivity to the number of layers and their relative orientation.
  • AAAA stacking exhibits a quadratic intensity increase for odd and even harmonics, indicating constructive interference.
  • Deviations from scaling above the bandgap are attributed to self-absorption.
  • Even-order harmonics are suppressed in AB and ABAB stacking due to inversion symmetry.

Conclusions:

  • Demonstrated controlled, nonperturbative HHG from stacked TMDCs using intense MIR fields without sample damage.
  • Results provide a pathway for optimizing nanoscale solid-state HHG sources.
  • HHG can serve as an ultrafast probe for stacked layered materials, including Moiré patterns.